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Acquisitions and Divestitures (Divestitures) (Details) - USD ($)
$ in Thousands
3 Months Ended 7 Months Ended 8 Months Ended 9 Months Ended 12 Months Ended
Dec. 30, 2016
Oct. 10, 2016
Sep. 09, 2016
Jul. 29, 2016
Mar. 31, 2017
Mar. 31, 2016
Jul. 29, 2016
Sep. 09, 2016
Oct. 10, 2016
Dec. 31, 2016
Dec. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Revenue         $ 553,552 $ 502,572          
Hydra-Stop Product Line | Disposed of by Sale                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Proceeds from sale of business       $ 15,000              
Gain (loss) on sale of businesses       5,800              
Additional proceeds from sale of business       $ 2,000              
Earnings for achievement                   $ 1,000  
Possible earnings for achievement                   $ 1,000  
Revenue             $ 7,500        
Melles Griot KK Subsidiary | Disposed of by Sale                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Proceeds from sale of business     $ 17,500                
Gain (loss) on sale of businesses     $ (7,900)                
Revenue               $ 13,100      
IETG and 40Seven Subsidiaries | Disposed of by Sale                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Proceeds from sale of business   $ 2,700                  
Gain (loss) on sale of businesses   $ (4,200)                  
Revenue                 $ 8,300    
Korea Electro-Optics Co., Ltd. (CVI Korea) | Disposed of by Sale                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Proceeds from sale of business $ 3,800                    
Gain (loss) on sale of businesses $ (16,000)                    
Revenue                     $ 11,700